/* retina 边框函数基础声明，不包含 border 部分，主要用于在 #retina-border 函数里继承 */
#retina-border-basic {
  position: relative;
}
#retina-border-basic:before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  transform-origin: left top;
  box-sizing: border-box;
  pointer-events: none;
}
@media (-webkit-min-device-pixel-ratio: 2) {
  #retina-border-basic:before {
    width: 200%;
    height: 200%;
    transform: scale(0.5);
  }
}
@media (-webkit-min-device-pixel-ratio: 3) {
  #retina-border-basic:before {
    width: 300%;
    height: 300%;
    transform: scale(0.33333333);
  }
}
/* 设置圆角（如果圆角大于0，则添加圆角的代码） */
/* retina 边框函数核心声明 */
